Yuyou Chow

Results 3 issues of Yuyou Chow

``` func (u *Updater) wantUpdate() bool { path := u.getExecRelativeDir(u.Dir + upcktimePath) if u.CurrentVersion == "dev" || readTime(path).After(time.Now()) { return false } wait := 24*time.Hour + randDuration(24*time.Hour) return writeTime(path, time.Now().Add(wait))...

1. Add otp-25 `maybe_expr` support. #970 2. Fix "Setup SDK" suggests. #977 3. Fix rebar version check. #903

1. Add block before `ERL_IMPORT_FUNCTIONS`. 2. `Maybe Expr` indent process.